Where does the facial nerve run?

Asked By: Evolet Angelkort | Last Updated: 28th January, 2020
Category: medical health brain and nervous system disorders
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The nerves typically travels from the pons through the facial canal in the temporal bone and exits the skull at the stylomastoid foramen. It arises from the brainstem from an area posterior to the cranial nerve VI (abducens nerve) and anterior to cranial nerve VIII (vestibulocochlear nerve).

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Keeping this in view, where does the facial nerve cross?

The chorda tympani branch of the facial nerve is responsible for innervating the anterior 2/3 of the tongue with the special sense of taste. The nerve arises in the facial canal, and travels across the bones of the middle ear, exiting via the petrotympanic fissure, and entering the infratemporal fossa.

One may also ask, how many facial nerves are there? two

Considering this, where does the facial nerve originate?

Origin and course. The motor root of the facial nerve originates in the facial (motor) nerve nucleus in the pons of the brainstem, which receives input from a number of other structures and brain regions, including the primary motor cortex and the ophthalmic division of the trigeminal nerve.

What muscles are innervated by facial nerve?

The facial nerve passes through the stylomastoid foramen in the skull and terminates into the zygomatic, buccal, mandibular, and cervical branches. These nerves serve the muscles of facial expression, which include the frontalis, orbicularis oculi, orbicularis oris, buccinator, and platysma muscles.

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How do you treat facial nerve damage?

Medication for Facial Nerve Paralysis
  1. Corticosteroids. Corticosteroid medications reduce swelling in the seventh cranial nerve.
  2. Antiviral Medications. Doctors often prescribe antiviral medications in addition to corticosteroids to fight a viral infection that may be causing inflammation in the facial nerve.
  3. Eye Drops.

Where is the 7th facial nerve located?

The facial nerve is the seventh cranial nerve, or simply CN VII. It emerges from the pons of the brainstem, controls the muscles of facial expression, and functions in the conveyance of taste sensations from the anterior two-thirds of the tongue.

How long does it take for facial nerve damage to heal?

o Most patients should have some recovery within the first 2-4 weeks, however, complete recovery may take up to 6 months. If you have facial paralysis without recovery for more than 6 months you should see a physician immediately.

What are the 12 facial nerves?

The twelve cranial nerves, in order from I to XII are: olfactory nerve, optic nerve, oculomotor nerve, trochlear nerve, trigeminal nerve, abducens nerve, facial nerve, vestibulocochlear nerve, glossopharengeal nerve, vagus nerve, spinal accessory nerve, and hypoglossal nerve.

What is the facial nerve called?

The facial nerve is also known as the seventh cranial nerve (CN7). This nerve performs two major functions. It conveys some sensory information from the tongue and the interior of the mouth.

How deep is the facial nerve?

The main nerve trunk emerged anterior to the midearlobe and was 20.1 +/- 3.1 mm deep. Nerve exit from the parotid edge also was deep, averaging 9.1 +/- 2.8 mm for temporal, 9.2 +/- 2.2 mm for zygomatic, 9.6 +/- 2.0 mm for buccal, and 10.6 +/- 2.7 mm for mandibular branches.

Is cranial nerve 7 motor or sensory?

Table of cranial nerves
No. Name Sensory, motor, or both
VI Abducens Mainly motor
VII Facial Both sensory and motor
VIII Vestibulocochlear In older texts: auditory, acoustic. Mostly sensory
IX Glossopharyngeal Both sensory and motor

What nerves affect the face?

The trigeminal nerve supplies feeling and movement to the face. It has three divisions that branch from the trigeminal ganglion: ophthalmic division (V1) provides sensation to the forehead and eye, maxillary division (V2) provides sensation to the cheek, and mandibular division (V3) provides sensation to the jaw.

Which number of cranial nerve is the vagus nerve?

Vagus nerve. Vagus nerve, also called X cranial nerve or 10th cranial nerve, longest and most complex of the cranial nerves. The vagus nerve runs from the brain through the face and thorax to the abdomen.

Is the facial nerve contralateral?

In the brainstem, these fibers cross over to the opposite, or contralateral, facial nerve. Therefore, the eyes and forehead receive innervation from both hemispheres, while the lower face only receives innervation from the contralateral hemisphere.

Does facial paralysis go away?

Although it can take six months or more to recover from Bell's palsy, most people will recover completely, with or without treatment. Unfortunately, even with all current options for therapy, some cases of facial paralysis may never completely go away.

Does the facial nerve Decussate?

The cranial nerves do not decussate generally with exceptions being CN2, CN4, CN7 and CN12. That means if a lesion affects Cranial Nerve 1, 5, 8, 9 and 11 or the respective nucleus there is either sensation loss or atrophy of the muscle (dependent on what the nerve does) of the ipsilateral side.

Does facial nerve have a sensory component?

The sensory component provides innervation to the external auditory meatus, the tympanic membrane, and the pinna of the ear. The facial nerve also carries taste sensation from the anterior two-thirds of the tongue. Special visceral efferent (SVE) fibers (branchiomotor) are a major component of the facial nerve.

Is the vagus nerve sensory or motor?

The vagus nerve is the longest cranial nerve. It contains motor and sensory fibers and, because it passes through the neck and thorax to the abdomen, has the widest distribution in the body. It contains somatic and visceral afferent fibers, as well as general and special visceral efferent fibers.

Can Massage Help Bell's palsy?

The National Institute of Neurological Disorders and Stroke (NINDS) recommends massage therapy and facial exercises as a beneficial treatment for Bell's Palsy. Steroid medications are sometimes used to reduce inflammation and can be particularly effective when combined with massage treatment.

What causes facial nerve pain?

Trigeminal neuralgia can occur as a result of aging, or it can be related to multiple sclerosis or a similar disorder that damages the myelin sheath protecting certain nerves. Trigeminal neuralgia can also be caused by a tumor compressing the trigeminal nerve.

How long is the facial nerve?

Segment Location Length, mm
Meatal segment Brainstem to internal acoustic meatus or canal (IAC) 13-15
Labyrinthine segment Fundus of IAC to facial hiatus 3-4
Tympanic segment Geniculate ganglion to pyramidal eminence 8-11
Mastoid segment Pyramidal eminence to stylomastoid foramen 10-14